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Throughout the history of materials science and physics, few topics have captured as much interest as the phenomenon of superconductivity (SPC), discovered in 1911. Perhaps this is because of the intriguing interpretation of the phenomenon, which remains controversial, or for the secret hope of being able to synthesize a material with a critical superconductive transition temperature (TC) high enough to revolutionize the sector of energy generation and transport. As a matter of fact, the search for new superconductor materials has motivated an army of scientists, in particular, after the discovery of high-TC superconductor cuprates (HTS) in the mid-80s. Besides the unremitting interest in HTS, new materials, such as intermetallic borides, iron–nickel-based superconductors, heavy fermion, and organic and superhydride systems, are still delivering outstanding achievements to the scientific community, among which includes thousands of papers and a handful of Nobel prize winners). This Special Issue “Synthesis and Characterization of New Superconductor Materials” is a collection of scientific contributions providing new insights and advances in this fascinating field, addressing issues ranging from the fundamental research (theory and correlation between critical temperature, TC, and structural properties) to the development of innovative solutions for practical applications of superconductivity: Synthesis of new superconducting materials Magnetic and/or electric characterization of the TC transition Role of crystal symmetry and chemical substitutions on TC TC dependence on external stimuli and/or non-ambient conditions Theoretical modeling

Dirac electron --- Landau level --- interlayer magnetoresistance --- organic conductor --- α-(BEDT-TTF)2I3 --- Er123 --- melt temperature --- superconducting solder --- superconducting joint --- FeSe --- superconductivity --- high pressure --- chemical intercalation --- interfacial coupling --- AC susceptibility --- BaZrO3 --- co-precipitation --- solid-state --- YBa2Cu3O7−δ --- Weyl semimetal --- focused ion beam --- high-temperature superconductors --- bismuth-based cuprates --- Bi-2212 --- n/a

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Since the great success of graphene, atomically thin-layered nanomaterials, called two dimensional (2D) materials, have attracted tremendous attention due to their extraordinary physical properties. Specifically, van der Waals heterostructured architectures based on a few 2D materials, named atomic-scale Lego, have been proposed as unprecedented platforms for the implementation of versatile devices with a completely novel function or extremely high-performance, shifting the research paradigm in materials science and engineering. Thus, diverse 2D materials beyond existing bulk materials have been widely studied for promising electronic, optoelectronic, mechanical, and thermoelectric applications. Especially, this Special Issue included the recent advances in the unique preparation methods such as exfoliation-based synthesis and vacuum-based deposition of diverse 2D materials and also their device applications based on interesting physical properties. Specifically, this Editorial consists of the following two parts: Preparation methods of 2D materials and Properties of 2D materials

History of engineering & technology --- α-MoO3 --- carbon nitride --- g-C3N4 --- molybdenum trioxide --- nanoplates --- synthesis --- few-layer MoS2 --- magnetron sputtering --- magnetron sputtering power --- raman spectroscopy --- disorder --- V2Se9 --- atomic crystal --- mechanical exfoliation --- scanning Kelvin probe microscopy --- MoS2 --- black phosphorus --- 2D/2D heterojunction --- junction FET --- tunneling diode --- tunneling FET --- band-to-band tunneling (BTBT) --- natural molybdenite --- MoS2 nanosheet --- SiO2 --- liquid exfoliation --- photoelectric properties --- uniaxial strain --- flexible substrate --- film-substrate interaction --- photoluminescence --- Raman spectroscopy --- molybdenum disulfide --- bilayer-stacked structure --- WS2 --- lubricant additives --- tribological properties --- interfacial layer --- contact resistance --- bias stress stability --- saturable absorbers --- Langmuir-Blodgett technique --- Q-switched laser --- chemical vapor deposition --- P2O5 --- p-type conduction --- P-doped MoS2 --- transition metal dichalcogenides --- two-dimensional materials --- ferroelectrics --- 2D heterostructure --- WSe2 --- NbSe2 --- Nb2O5 interlayer --- synapse device --- neuromorphic system --- α-MoO3 --- carbon nitride --- g-C3N4 --- molybdenum trioxide --- nanoplates --- synthesis --- few-layer MoS2 --- magnetron sputtering --- magnetron sputtering power --- raman spectroscopy --- disorder --- V2Se9 --- atomic crystal --- mechanical exfoliation --- scanning Kelvin probe microscopy --- MoS2 --- black phosphorus --- 2D/2D heterojunction --- junction FET --- tunneling diode --- tunneling FET --- band-to-band tunneling (BTBT) --- natural molybdenite --- MoS2 nanosheet --- SiO2 --- liquid exfoliation --- photoelectric properties --- uniaxial strain --- flexible substrate --- film-substrate interaction --- photoluminescence --- Raman spectroscopy --- molybdenum disulfide --- bilayer-stacked structure --- WS2 --- lubricant additives --- tribological properties --- interfacial layer --- contact resistance --- bias stress stability --- saturable absorbers --- Langmuir-Blodgett technique --- Q-switched laser --- chemical vapor deposition --- P2O5 --- p-type conduction --- P-doped MoS2 --- transition metal dichalcogenides --- two-dimensional materials --- ferroelectrics --- 2D heterostructure --- WSe2 --- NbSe2 --- Nb2O5 interlayer --- synapse device --- neuromorphic system

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Welding remains one of the most studied manufacturing processes worldwide. It has always assumed a vital importance in terms of research, and the market demand for increasingly complex solutions has kept the search for new solutions around welding more and more alive. This book describes, in 14 chapters, recent investigations around various welding processes, showing new developments in important areas, such as biomedicine or the automotive industry. Following the current trend, several developments around the friction stir welding process are also described. However, other processes are also studied, and new interesting developments are presented. Problems normally felt in welding, such as the installation of internal stresses or the generation of defects are also studied, and very interesting solutions are provided. Thus, this book is of particular importance for a very wide audience, ranging from the technician who is curious to want to know more and more, to the professor who seeks the latest developments in the matter to prepare his classes.

History of engineering & technology --- spot welding --- hot-stamped hardened steel --- microstructure --- martensite --- bainite --- friction stir welding --- aluminium alloys --- forced air cooling --- microstructures --- tensile strength --- hardness distribution --- ferritic stainless steel --- cerium --- solidification crack --- Trans-varestraint test --- beryllium-copper alloy --- mechanical properties --- post-weld heat treatment --- high-power ultrasonic welding --- interface --- magnesium --- cu interlayer --- intermetallic compound --- material flow --- finite element model --- temperature field --- welding defects --- brazing --- titanium --- alumina --- interfacial microstructure --- FSSW --- dissimilar metals --- interface behavior --- impact properties --- residual stresses --- neutron diffraction --- hardness --- precipitation --- wear-resistant martensitic steel --- submerged arc welding (SAW) --- heat treatment --- structures --- hardness changes --- Hardox Extreme steel --- bobbin friction stir welding --- materials flow --- metallography --- AA6082-T6 --- weld defect --- aluminum alloy --- heterogeneity --- mechanical --- P91 steel --- heat-resistant steels --- welding --- PWHT --- welds characterization --- heat-treatment processing time --- sustainability --- ultrasonic vibration --- dissimilar metal --- semi-solid status --- microstructure evolution

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Since the great success of graphene, atomically thin-layered nanomaterials, called two dimensional (2D) materials, have attracted tremendous attention due to their extraordinary physical properties. Specifically, van der Waals heterostructured architectures based on a few 2D materials, named atomic-scale Lego, have been proposed as unprecedented platforms for the implementation of versatile devices with a completely novel function or extremely high-performance, shifting the research paradigm in materials science and engineering. Thus, diverse 2D materials beyond existing bulk materials have been widely studied for promising electronic, optoelectronic, mechanical, and thermoelectric applications. Especially, this Special Issue included the recent advances in the unique preparation methods such as exfoliation-based synthesis and vacuum-based deposition of diverse 2D materials and also their device applications based on interesting physical properties. Specifically, this Editorial consists of the following two parts: Preparation methods of 2D materials and Properties of 2D materials

History of engineering & technology --- α-MoO3 --- carbon nitride --- g-C3N4 --- molybdenum trioxide --- nanoplates --- synthesis --- few-layer MoS2 --- magnetron sputtering --- magnetron sputtering power --- raman spectroscopy --- disorder --- V2Se9 --- atomic crystal --- mechanical exfoliation --- scanning Kelvin probe microscopy --- MoS2 --- black phosphorus --- 2D/2D heterojunction --- junction FET --- tunneling diode --- tunneling FET --- band-to-band tunneling (BTBT) --- natural molybdenite --- MoS2 nanosheet --- SiO2 --- liquid exfoliation --- photoelectric properties --- uniaxial strain --- flexible substrate --- film–substrate interaction --- photoluminescence --- Raman spectroscopy --- molybdenum disulfide --- bilayer-stacked structure --- WS2 --- lubricant additives --- tribological properties --- interfacial layer --- contact resistance --- bias stress stability --- saturable absorbers --- Langmuir–Blodgett technique --- Q-switched laser --- chemical vapor deposition --- P2O5 --- p-type conduction --- P-doped MoS2 --- transition metal dichalcogenides --- two-dimensional materials --- ferroelectrics --- 2D heterostructure --- WSe2 --- NbSe2 --- Nb2O5 interlayer --- synapse device --- neuromorphic system --- n/a --- film-substrate interaction --- Langmuir-Blodgett technique

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In a similar way to many other engineering fields, the road pavement industry strongly affects the critical issues of our generation, including climate change, pollutant emission, the exploitation of natural resources and economic crises. For this reason, technicians and researchers are searching ravenously for sustainable solutions to implement in current road construction systems with the following goals: To reduce the consumption of energy and virgin materials; To run environmentally and economically friendly maintenance; To recycle waste from different industrial processes; To decrease the noise, the pollution and the heat generated by traffic, particularly in urban contexts. This Special Issue aims to collect high-quality studies that combine the aforementioned solutions, including works pertaining to: The hot, warm, and cold recycling of reclaimed asphalt pavement; Marginal materials for asphalt pavements; Innovative sustainable materials; Durability and environmental aspects; Structure performance, modeling and design; Advanced trends in rehabilitation and preservation; Surface characteristics and road safety; Management system/life cycle analysis; Urban heat island mitigation; Energy harvesting.

porous concrete --- metakaolin --- geopolymers --- permeable pavements --- urban drainage systems --- maintenance --- reinforced asphalt pavement --- geogrid --- interlayer bonding --- static shear test --- cyclic shear test --- fatigue properties --- warm mix asphalt --- natural zeolite --- gas emissions --- energy consumption --- production costs --- bituminous mixtures --- nano-additives --- nanoclay --- carbon nanotubes --- graphene nanoplatelets --- nano-calcium oxide --- nano-titanium dioxide --- sonication --- fatigue performance --- self-healing --- hot-mix asphalt --- ageing --- cooling --- temperature segregation --- hauling --- insulated truck --- re-heating --- contact stresses --- rolling resistance --- braking --- free rolling --- load --- inflation pressure --- speed --- porosity --- permeability coefficients --- mixing ratio --- aggregate size --- compressive strength --- computed tomography (CT) image --- ex-post CBA --- road modernisation --- incidence of traffic accidents --- decision-making process --- life cycle assessment --- waste management --- circular economy --- alternative materials --- construction --- road stabilisation --- bearing capacity --- unbound base course --- cold central-plant recycled base course --- falling weight deflectometer (FWD), cold recycling in-plant --- bitumen --- aging --- rejuvenation --- reclaimed asphalt --- recycling --- coal bottom ash --- waste material --- recycle --- construction industry --- civil engineering --- bitumen selection --- performance-graded bitumen --- asphalt pavement temperatures --- temperature maps --- n/a